MSP430FR5969: how to implement ECC with CCS?

Hi,

As shown in document, the MSP430FR5969 has error-correcting code FRAM. We implemented the ECC code with the method shown in the "MSP430 Assembly Language Tools". 

After a data error was injected, we downloaded the code to the MSP430 board. The data error was not corrected after power on.

How can we implement the ECC function with CCS?  Could you please provide more details and give us some document on it? Thanks a lot!